Hose coupling



Nov. 5, 1940. A. A. FORSBERG HOSE COUPLING Filed March 23, 1938 BYp/Z 4 AAHORNEY.

Patented Nov. 5, 1940 UNITED STATES nose COUPLING 4 Axel Albert Forsberg, Stockholm, Sweden, assignor to Electrolux Corporation, Dover, Del., a corporation of Delaware Application March 23, 1938, Serial No. 197,593 In Germany March 31,1937

4 Claims. (on. ass-71) tion with vacuum cleaners and more particularly to an improved end structure for a hose.

In order to connect a flexible hose to a vacuum' cleaner unit or to any of the various cleaning tools, it is usual to provide a rigid end-piece for the hose. Such end-piece includes a portion having a diameter substantially the same as the outerdiameter of the flexible part of the hose, the end of the hose proper being inserted within this portion of the end-piece and being secured thereto by means of glue or other adhesives. Inasmuch as the end of the flexible part of the i5 hose is enclosed, it is protected from injury. However, if the rigid end structure is injured considerable difficulty is experienced in removing it from the flexible-part.

One of the objects of my invention is to provide an end structure, which protects the end of the flexible part of the hose and at the same time is readily removable therefrom in order that it may be replaced in case it is damaged. Another object of nm invention is to provide an 85 improved means for securing the end structure to the flexible part of the hose.

Further objects and advantages of my invention will be apparent from the followingdescription considered in connection with the accompanying drawing, which forms a part of this specification and of which:

Fig. 1 is a cross-sectional view of one embodiment of my invention;

Fig. 2 is a cross-sectional view similar to Fig. 1,

:5 but showing a difierent embodiment of my invention;

Fig. 3 is a side view of one of the parts included in the device shown in Fig. 2; and

Fig. 4 is a cross-sectional view of a third em- ,bodiment of my invention.

Referring more particularly to Fig. 1; reference character i ll designates a flexible tubular member forming the flexible part of a hose. Secured within tubular member ID adjacent to the 5 end thereof is a rigid sleeve H, the outer diameter of which is substantially equal to the inner diameter of member Hi. This sleeve is permanently secured within the tubular member, as by being glued or in any other manner. Sleeve II 0 extends beyond the end of tubular member l0 and is there formed on its outer surface with a circular ridge l2 and at its end sleeve H is formed with an outwardly extending flange I3. Between flange l3 and ridge l2 there is consequently formed an annular groove ll.

' Surrounding tubular member I0 is an outer rigid sleeve l5, one end of which is formed with an inturned flange IS. The inner diameter of flange I6 is less than the outer diameter of ridge 52 but is slightly greater than the outer diam eter of flange l3, whereby the outer sleeve may be put in place in the position shown in Fig. 1.

A resilient locking ring I! is adapted to be placedv in! the groove It. The inner diameter of ring H is less than the outer diameter of flange is, w while the outer diameter of ring ll is greater than the inner diameter of flange l6. Consequently, when the ring IT is in place it serves to prevent relative axial movement between the two sleeves. The ring is split, as is indicated at it in order to facilitate placing it in position and removing it. The resiliency of the ring causes it to contract in diameter after it has sprung suficiently to pass over flange it.

It will be noted that with the end structure 29 as shown in Fig. 1, a rigidreinforcing sleeve is provided at both the inside and the outside of the end of the hose. Moreover, the outer sleeve which is much more likely to be damaged than is the inner is removably secured to the inner 25 sleeve, whereby it may be easily replaced in the event of damage.

The embodiment illustrated in Figs. 2 and 3 differs from that shown in Fig. 1 only in the manner in which the inner sleeve H is secured 89 to the flexible portion of the hose. In this embodiment the flexible part comprises flexible material within which is embedded a spiral spring 29. The inner sleeve ll is formed with projecting members 28, which maybe struck from the as material of the sleeve. These projecting members are engaged around the spring 20, preferably before the spring is embedded in the material. forming the wall of the hose. In this manner the inner sleeve H is firmly secured to the flex- 4g 3 forrotation between the inner sleeve and the outer sleeve. Also, in this embodiment the outer sleeve I511. is shown as carrying a latching mechanism 23, which includes a spring 24 which urges a catch member 25 outwardly. through an opening formed in the sleeve l5a. The catch ":5

2 2,220,480 tending beyond the end thereof, a rigid outer member is adapted to engage a suitable part on the vacuum cleaner unit or on the tool so as to releasably secure the hose to the unit or the tool. The specific construction of this coupling arrangement does not constitute a part of the present invention and has not been illustrated in detail. However, inasmuch as it is carried by the outer removable sleeve, it may be readily replaced in the event it is damaged.

While I have shown several more or less speciflc embodiments of my invention, it is to be understood that this has been done for purposes of illustration onlyand is not intended to limit the scope of my invention, which is to be determined by the appended claims viewed in the light of the prior art.

What I claim is.

1. A hose including a tubular flexible member, a rigid sleeve within said member and permanently connected thereto and extending beyond 1 theend thereof, a rigid outer sleeve freely surrounding said tubular member, and means for rotatably and removably securing said sleeves together beyond said tubular member, the connection between the first mentioned sleeve and said tubular member being entirely independent of said outer sleeve, whereby the outersleeve is freely rotatable when the parts are assembled.

2. A hose includinga tubular flexible member, a rigid sleeve fixed within said member and exsleeve surrounding said tubular member, means for removably and rotatably securing said sleeves together beyond said tubular member, and coupling means carried by said outer sleeve.

3. A hose including a tubular flexible member, a rigid sleeve within said member and permanently connected thereto and extending beyond the end thereof, a rigid outer sleeve surrounding said tubular member, and a removable locking ring engaging said sleeves beyond said tubular member for removably securing said sleeves together, the connection between the first mentioned sleeve and said tubular member being entirely independent of said tubular sleeve.

4. A protective end fitting for flexible hose comprising arigid-sleeve within the end of the hose and permanently connected thereto and extending outwardly beyond said end, a rigid outer sleeve surrounding and enclosing the end of the hose but slightly spaced throughout its length from the outer surface of the hose, said sleeves being deformed adjacent the end of the hose providing inter-engaging portions, and means detachably locking said portions to one another permitting, the outer sleeve to be withdrawn over the end of the hose and the inner sleeve.

AXEL ALBERT FORSBERG. w 

